Skip to content

Baader Rowe Coma Corrector (RCC I)

£145.00
SKU 2956800

Availability: Immediate Dispatch

  • The RCC I (Rowe Coma Corrector) triplet lens design for Newtonian telescopes
  • Works with telescopes from f/3.5 to f/6 - it is perfect on f/4
  • Backfocus of 91.5mm sufficient for filter wheels or other accessories without changing the focal ratio
  • reproduction scale is 1:1 
  • The RCC is the only coma corrector which gives you 
Description

The Baader Rowe Coma Corrector (RCC I) is designed to correct Coma in fast Newtonian imaging systems. It is a triplet lens design and each air/glass-surface of the triplet RCC optical system is coated with our Phantom Group Coating for the best-possible transmission.

The RCC I provides a long back-focus of 91.5 mm, measured from the T-2-thread, enabling the use of Off-Axis Guiders, Adaptive Optics and Filter Wheels. Autoguiding can be done easily with the RCC, an RCC Off Axis Guider and an Autoguiding Camera. 

The main features are:

  • The RCC works from f/3.5 to f/6 - it is perfect on f/4
  • reproduction scale is 1:1 - in contrast to many other coma correctors, the RCC is no Barlow lens which rely on a magnification to make the larger back-focus to the sensor possible
  • The RCC is the only coma corrector which gives you enough back-focus for filter wheels or other accessories without changing the focal ratio

To attach the RCC directly to a camera (without an Off-Axis-Guider), we recommend the Baader VariLock 46 T-2 Extension (# 2956946 T-2 part-no. #25V). This has a graduated mm-scale, but also a marking at 36.5mm, to show you the perfect working distance for a DSLR with T-2-adaptor. You can remove the stopper ring to place the RCC deeper inside of your focuser.

Technical Data - Overview

  • reproduction scale: 1:1
  • recommended focal ratios: f/3.5 - f/6 (optimised for f/4)
  • Focal position (perfect distance to the sensor): 91.5 mm measured from the T-2 thread / 94.5 mm from the M48 thread
  • inner connection (lens side): 2" nosepiece with M48i filter thread for 2" eyepiece filters
  • outer connection (telescope side): T2 (M 42 x 0.75_a; without the stop ring M 48_a)
  • longest overall depth: 73 mm / without the stop ring 75 mm / without the stop ring and RCC Off Axis Guider 84mm
  • Diameter of the housing: 50.8mm/2"

Specifications

MANUFACTURER Baader Planetarium
SKU (#) 2956800
WEIGHT (KG) 0.219
INNER CONNECTION (LENS SIDED) Thread, M48
OUTER CONNECTION (LENS SIDED) Barrel, 2" (50,8mm)
OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, T-2 (M42 x 0,75), M48
AR-COATING Phantom Coating® Group
OPTIMIZED FOR FOCAL RATIO f/4
WORKING RANGE f/3.5 – f/6
IMAGE SCALE 1:1
BARREL SIZE (IN) 2"
OPTICAL DESIGN Coma Corrector
COMPATIBLE TELESCOPES Newton